Improvement in machines fob gbinding saws



E. c. ATKINS. lVIachne for Grinding Saws.

Patented Ang. 6, 1867:V

2 Sheets-Sheet 2.

E. C. ATKINS. Machine for Grinding Saws.

Patented Aug. 6, i867.

Mwave@ @twitch tatrsgetest @Hirn ELIAS C. ATKINS, OF INDIANAPOLIS, INDIANA. Letters I Jate'nt No. 67,480, dated August 6, 1867.

'IMPROVEMENT IN MACHINES FOB GRINDING SAWS.

"a'tlgergetule referat tu in tigen *Qi-ritira ntent mit mittig pnrt nf it: samt.

TO ALL WHOM IT MAYCONCERN:

Be it known that I, ELIAS C. ATKINS, of the city of' Indianapolis, Marion county, and State of Indiana,

have invented a new and improved Machine for Grinding Long Saws;" and I do hereby declare that the fol--` lowing isa full, clear, and exact description of the construction and operation of the same, reference beiner had vto the annexed drawings, making a part of this specification, in which- Figure 1 is a perspective view.

Figure 2, an elevation and cross-section.

Figure 3, a section; and

Figure 4 a section.

By the ordinary method of grinding saws, the saw is heldin contact with theface of the grindstone, and moved hack and forward hy the hand. Myinvention produces the same effect by means of machinery in a similar manner. 4

The machine consists of the main frame A, iig. 1, on which the machine rests. The upright postsB B support the grindstonefshaft M on which the grindstone K is hung. The shaft M is attached to the upright` posts B B by means cf the head-blocks H H, which are bolted firmly to the posts. The sliding-bearers I I are 'held parallel with the head-blocks H H by means of a bolt passing through them and the headblocks H and posts B, and likewise in'position with regard to elevation by means of the adjusting-screws O 0. The adjustable boxes N N through which the shaft passes rest on the sliding-bearers I I, which are made oval on the top edge to receive them, as `represented at k', iig. 2, and are secured in position without interfering with their adjustment to the line of the shaft M, by means of the pin K4', cross-section, fig. 2, and the boltsa a', iig. 2. The grndstone is rotated by meansof a belt passing over the pulley L. As the stone wears itis necessary to lower it, which is accomplished by means of the elevating-screws O O. The saw P is placed upon the table G, secured in position by means of the pin w inserted in the slide v, or by means of the lugs y l7,l-attacl1ed to the slide x,- showu in section, iig.'3. The lugs yy-are movable on the slide :c to receive any width of saw, and secured in their place, when adjusted, by means of the setscrews z z. The table G rests on the springs t, six

in number, andi is held` in position, without interfering with the action of the springs, by means of the bolts u,

six in number, passingithroughit and the carriage F, and by lugs attached to the under side, projecting down and resting against the cross-hars of the carriage F. These lugs prevent'l the lateral motion of the table G independent of the carriage F. The carriage F is moved back and forward on the way-frameE in the groove V, lto which it is itted by means of the screw d which passes through a nut attached to the carriage F. The screw ai is rotated by means of the gearing Y Y and Z; Z being attached to the screw d, and Y Y respectively to the shafts a and 6; a being a solid shaft and passing through b, which is made hollow to receive it. The shafts a and b are rotated by means of the belt e passing over the pulleys W W X, being` loose upon the shaft b to allow the machine to be at rest. The gear-wheels Y Y being upon opposite sides of the gear Z, move it in opposite directions, while they rotate in the same direction.

'In operating the machine the lateral motion of thecarriage :F back and forth is secured by shifting the belt e from one pulley W to the other 'pulley W by means of the handle g, slide 'n in box m, connecting-rods l lc j ic, and leversh hand Z in box m, and` the looped rod g passingjround the belt e; also by means of the lugs s s which, by the motion of the carriage F, to whichv they are attached are brought in contact with 'the pins o d in slide n; thus the operator may reverse the motion of the carriage F by means of the handle g, or the machine will do it by the lugss s pressing against the pins o di (See sec., iig. 4.) The springst may be placed under the way-frame E, but do not operate as satisfactorily. The way-frame E is supported at one end by the cross-bar c, and at the other end, where the operator stands, by the elevating-screws R R which rest in iron boxes on the main frame A. and are' connected together by means of` the gear-wheels T T and U, and operated by the wheel S.

y Operation.

In operating, the grindsto'ne K is rst set in motion; the saw r' is placed upon the table G, and' secured by means of the pin w or the lugs y y. The operator sets the carriage F inmotion by passing the belt e to the pulleys W, and, by means of the elevatingcrews R R, raises the way-frame E, and thus `brings the saw P ably supported at one end upon theserews R, substantially as and for the purpose setforth.

in contact with the grindstone K. If'the saw is narrower than the grindstone, or it is desired to grind only a part at ottime, or, in eonsequence of irregularity of grain, the grindstone tends to wear unevenly, the sow is moved from side to side off'the table G, (seesee, fig, 3,) the slides v uml x' being inserted in grooves extending across the table G. If it is desired to grind one edge of the sow thinner than the other, this is accomplished by lowering one end of the shaft M by means of the elevating-screws O, the box N adjusting itself to the line of theshaft M, thus avoiding friction. The sew being sometimes harder or thicker in some parts than others, the st'one is liable to heat and color these parts. This is obviatecl by the action of the springs t, producing a variable pressure, and 'at the lsaune time even thickness is secured by the bolts u passing through the table G and carriage F and adjusting the'heightof the table.

W'hnt I claim as my invention isr y 1."'J.`he combination and arrangement of the grindstone K und shaft M, collar N, adjustableboxes I7 with pins K', and set-screw O with the lreciprocating bed G, supported upon rods u and snringst, substantially as and for the purposelset forth. Y v

2. In combination with the bed G, rods u, andsprings t, I claim the carriage F and way-frame E, adjusto E. C. ATKINS. Witnesses:

WM. SULLIVAN, AARON JonNsoN. 

